armbian-next: rename compile_plymouth-theme-armbian() to compile_plymouth_theme_armbian() for consistency

lib/functions/compilation/debs.sh

@@ -195,7 +195,7 @@ compile_xilinx_bootgen() {
 }
 
 # @TODO: code from master via Igor; not yet armbian-next'fied! warning!!
-compile_plymouth-theme-armbian() {
+compile_plymouth_theme_armbian() {
 
 	local tmp_dir work_dir
 	tmp_dir=$(mktemp -d)

lib/functions/main/default-build.sh

@@ -118,7 +118,7 @@ function main_default_build_single() {
 	# Compile plymouth-theme-armbian if packed .deb does not exist or use the one from repository
 	if [[ ! -f ${DEB_STORAGE}/plymouth-theme-armbian_${REVISION}_all.deb ]]; then
 		if [[ "${REPOSITORY_INSTALL}" != *plymouth-theme-armbian* ]]; then
-			compile_plymouth-theme-armbian
+			compile_plymouth_theme_armbian
 		fi
 	fi